Machine for molding plastic materials, such as confectionery



Oct. 11, 1949. w, R R 2,484,670

MACHINE FOR MOLDING PLASTIC MATERIALS, SUCH AS CONFECTIONERY 4 Sheets-Sheet 1 Filed Aug. 4, 1947 5," I Attorney Oct. 11, 1949. A. w. BARKER I 2,484,670

MACHINE FOR MOLDING PLASTIC MATERIALS, SUCH AS CONFECTIONERY Filed Aug. 4, 1947 4 SheetsSheet 2 O 5 m (0' 3 5 K g D x; I\ '2 m F/GZ Attorney Oct. 11, 1949. A. w. BARKER MACHINE FOR MOLDING PLASTIC MATERIALS,

4 Sheets-Sheet 3 SUCH AS CONFECTIONERY Filed Aug. 4, 1947 Oct. 11, 1949. A w. BARKER MACHINE FOR MOLDING PLASTIC MATERIALS,

' SUCH AS CONFECTIONERY Filed Aug. 4, 1947 4 Sheets-Sheet 4 g E npemor 2 g Attorney Patented Oct. 11, 1949 MACHINE FOR MOLDING PLASTIC MATE- RIALS, SUCH AS CONFECTIONERY Alfred Walter Barker, Tottenham, London,, England Application August 4, 1947, Serial No. 765,866 In Great Britain August 12, 1946 11 Claims.

This invention concerns a new or improved machine for moulding plastic materials and particularly plastic sugar used in the manufacture of confectionery or sweet-meats (e. g. fruit drops, acid drops and like boiled sweets), the machines being of the kind including a pair of moulding or impression rollers to which the plastic material is fed and between which this material is moulded to the required form, and in which the said rollers are disposed between the two sides of the frame of the machine and have their opposite ends supported in bearings in these sides.

In using machines of the above named kind (which are known, in the confectionery trade, as drop roller machines and are usually operated by female workers) in the manufacture of confectionery, considerable difficulty and loss of time has hitherto arisen due to the plastic sugar adhering to the moulding rollers and so necessitating the complete removal of these rollers from the machines for cleaning or for their replacement by clean rollers.

Similarly when it was desired to change the rollers in order to modify the size or shape of the objects being moulded it was hitherto necessary to remove the moulding rollers completely from the machine.

In drop roller machines of the kind referred to the moulding rollers are arranged vertically one above the other between the two sides of the frame of the machine and to remove these moulding rollers has hitherto been an operation quite outside the experience, skill and strength of the ordinary female worker and one which required the skill and strength of a skilled male engineer since it was necessary to remove bearings and other parts of the machine at both sides of the latter to free the rollers which had then to be lifted, complete with their shafts, vertically from the machine. Thus if the machine were rendered inoperable due to the adherence of the plastic sugar to the rollers or if the surface pattern of the rollers had to be changed, the machine had hitherto to stand idle until an engineer was available to dismantle the necessary section of the machine, lift the moulding rollers from the machine frame and then re-assemble the machine with clean rollers or rollers having a different surface pattern in place of those removed, this operation usually taking upwards of half an hour; meanwhile the machine operator was also idle.

It is an object of provide a machine of the the present invention to kind referred to having improved mountings for the moulding rollers 2' whereby the cleaning of the rollers or the changing of the impressions to be made by the rollers may be more easily effected than has hitherto been possible. A further object of the invention is to provide in such a machine a moulding roller arrangement of such a character that it should be within the ability and strength of any normally intelligent and skillful operator (whether male or female) of normal physical fitness to effect the said cleaning or changing operation without the assistance of a skilled male engineer.

According to the invention there is provided a machine of the kind referred to for mouldin plastic materials, especially plastic sugar in the manufacture of confectionery, wherein the moulding rollers are each furnished with an axially withdrawable impression cylinder and wherein the frame of the machine may be opened at least at one side to permit of the endwise withdrawal of the said impression cylinders from their rollers and through the side of the frame without removing the rollers themselves from the machine.

According to a, further aspect of the invention there is provided a machine of the kind referred to for moulding plastic materials, especially plastic sugar in the manufacture of confec- 'tionery, wherein the moulding rollers are each furnished with an interchangeable impression cylinder removable axially from an end of the roller, and wherein the frame of the machine, at least at one side, is provided with a section or sections positioning moulding roller bearings in this side of the machine but capable of being moved with respect to the said frame side to enable the said bearings to be removed axially from the corresponding roller trunnions or rollershaft ends and to open the frame side in order to expose the adjacent ends of the rollers for the endwise removal of the said impression cylinders from their rollers through the opened side of the machine-for cleaning, replacement or other purposeswithout removing the rollers themselves from the machine.

By this invention the necessity for the complete removal of the rollers from the machine for cleaning or replacement is avoided, it merely being necessary to expose the ends of the two rollers at one side of the machine and then to remove the impression cylinders encasing the rollers endwise from the latter. The work involved is thus not such heavy or skilled work as was hitherto entailed by the complete removal of the rollers from the machine, and can be accomplished in a few minutes.

According to a further feature of the invention a section of the said openable frame-side is completely removable on each side of the bearings for the said moulding rollers, and, when removed, these sections leave a gap in the side frame large enough to expose the ends of the said rollers and to permit of the .endwiseremoval through this gap' of the impression cylinders of these rollers.

The said removable sections may be formed separately of one another andrbe arranged, when fitted into their side of the machine frama-to retain the roller bearings that are between them against axial movement along --the roller trunnions or shaft-ends whilst leaving a slot along which these bearings are. capable of :relative adjustment.

The said impression cylinders are preferably withdra-wable from one send only of their rollers and are retained upon-the latter byend or retaining plates having quick release' fastenings with' the rollers.

Where a water-circulating sytem is provided to cool (or heat) the rollers internally this system may be associated'with'the rollers at the end opposite to that-at which the impression cylinders are to be withdrawn so that thesaid systemneed not, in a machine constructed =-according 1 to this invention, be disturbed when changing theimpression cylinders in contradistinction to the hitherto known machines of the kind refer-red to where the whole circulatingsystem had ltobe disconnected from therollers -to enable thelatter to be removed from the'machine.

Preferabl mechanical adjustment means' are provided for adjusting-the bearingsof one of the moulding rollers in the sides of the frame of'the machine, and means are preferably :providedz'for fixing-the bearings of the otheramoulding'eroller in such frame so that the adjustment ofrtheifirst mentioned roller varies the:distancebetween 'the rollersas well as serving to permitsepara-tion; of the two rollers when the impression ':sleeves of one or both of the rollersis' orJareto-beremoved. The said adjustment. device preferablydncludesa fine adjustment and a fcoarse-:adjustment, the latter serving to enable theadjustable roller-.to be moved quickly to or from the other roller when desired.

Further features of the invention .willibecome apparent from the appended rde scriptionand claims.

In order thatthe nature of vthe invention and the manner of carrying same into practice may be more thoroughly understood .an embodiment of the same in a drop roller.machineforiuse'in the manufacture of boiled sweetsysubh as; for example, fruit drops, from plasticsugarwill now be described by way of example "with reference to the accompanying drawings in'whi'ch--- Figure l is a side elevation of the' 'said drop roller machine;

Figure 2 is a section'online 11- 11 Figure l, on a larger scale;

Figure 3 is a section on line III IIITigu-re 2;

Figure 4 is a perspective"view showing the discharge end of themachine illustrated in Figures 1 to 3 with some of the parts of the-machine removed to illustrate the-method of changing the impression cylinders of I the machine constructed in accordance withthisinvention;

Figure 5 is a part sectional sideelevationr'ofi the samemachine and showingzthe samesidebffthe machine asFigure 1 but withthe removable-sections of a side of the frame of thema'chmeiand lower ends of said sides and rigidly fixed thereto.

Thesaid frameis mounted upon a base 4 which mayube'formedlas ahollow metal casting. The

sides I and"? are likewise conveniently formed as :.metal-.castings..and the side 2 is furnished, near the discharge end 25 of the machine, with a verticalgap or slot 5 of rectangular form and open .at theupperedge of the side 2. The vertical sides 6 and l of the said gap are parallel and extend from the upper edge of the side 2 downwardly towards, but not quite to, the lower edge of such side as is clearlyseen from the drawings.

The horizontal width of the gap 25 issomewhat greater than theextern-al .diameterszof the moulding rollers ii and-:9ofzthe machine, which will hereinafter be :described, :and a pair of remov able metal sections itand II-are provided for insertion in the gap '5, ;one adjacent and in contact with each vertical side 6 and l of thefgap,

The insert sections. iii and I I are ofrectangular cross-sectional shape and of'long oblongiorm, the sections being adapted, when introducedinto the gap 5 as'shown. in. Figurel, partially to fill the gap 5 but toleave centrally of-.the-latter a vertical space or slot 12in. which are located one above the other, a pair of .bearing blocks 1'3 and it, these bearing blocks .respectivelyhaving at their inner andvouter longitudinal sides flanges l5, l5 and 43, I6, respectively adaptedtoembrace between them theinner vertical :edgesof the removable insert sections m .and I l wvhich .accurately position.- these bearing blocks. in. the sides 2 of the machine frame. .The bearing blocksl3 and is are tobarrytheshaft ends of vthe-rollers 8 and 9 as hereinaftersdescribed.and completely encircle these shaft ends insteadof being half bearings as hitherto.

The side I of the frame is providedwith-a vertical slot ll having a ,parallel rectilinear side and. which is arrangedcentrally opposite the-gap 5 in the side 2 of the machine 'framepin this slot are mounted a pair ofbearingblocks I 3a and Ma corresponding in all respects with the bearing blocks l3 and l l above referred to.

Theslot I'Zin the side 2 of-thelmachine frame corresponds-in form to the slot l7. in'theside"! of the frame, butthe'vertical sides of the slot [2 are defined by the inner verticale'dges of'the removable insert sections! and I [instead of; by the side2, thesaidesections being complementary to the latterside butbeing removable therefrom by sliding them upwardlylbetween the 'fianges l5, l5 and I6, Idoftheupper.and'lower bearing blocks 13 and Iii. I Outwardly projecting handles 18 are provided .onthesections "I0 and II to facilitate theremoval ofIthesesections fromthe side 2 of the machine frame orltheir replacement in the =latter.

mounted in a horizontal groove .22 in the :-;side

member 2 of the machine framcat the bottom of the gap-=5, this groove -22 constrainingthe, cam,

2| to slide in a plane parallel to the outside longitudinal surface of the side 2 of the machine frame and so at right angles to the axes of the rollers 8 and 9 of the machine. The upper oblique edge 23 of the cam 2| is adapted to engage and co-operate with the correspondingly inclined lower end 24 of the lower bearing block I4. A similar cam 2I is provided in the other side mem-, her I of the machine frame and similarly cooperates with the inclined underside of the bearing block I4a at that side of the machine.

The said two cams 2I are respectively fixed to the inner ends of a pair of parallel horizontal cam actuating rods 25 each slidably mounted in the corresponding side member of the machine frame and projecting beyond the discharge end 26 of the latter. The slidable actuating rods 25 are adjustably fixed one in each end of a rigid horizontal adjusting screw 28 furnished with a handle or wheel 29 at its outer end and adapted to bear at its inner end upon the outer surface of a circular quiclnrelease block 30. This block is eccentrically pivoted at 3I to the discharge end of the machine base 4 so that it can be swung upwardly into position between the inner end of the screw 28 and the discharge end of the machine frame as shown in full lines in Figure 3 for example, or dropped into the position indicated by dot-and-dash lines in the same figure.

The cams 2! are provided for raising and lowering the lower bearing blocks I4 and Ma of the lower moulding roller 9 of the machine, and to raise these bearing blocks the quick-release block is swung into the full line position shown in Figure 3 and the screw 28 is tightened up so as to force the cross bar 21 outwardly away from the quick-release block 30. To lower the bearing blocks I4 and I40. the screw 28 is released and the quick-release block 30 thrown to one side so that the latter part of the inward movement of the cams 2i may be hastened by pushing the cross bar 2'! inwards towards the machine base 4. The screw 28 provides a fine adjustment for the cams and the block 30 provides a adjustment therefor.

The end portions 32 and 33 of the camsZI are located in the recesses 59 in the lower ends of the removable insert sections In and II and so locate the latter in register with the portions of the side 2 of the machine frame adjacent the gap in such side.

Each of the sides I and 2 of the machine frame is provided, adjacent its upper edge, with a longitudinal horizontal bore 34, this bore extending, in the case of the side I on both sides of the vertical slot I1, and in the case of the side 2, beyond both vertical edges of the gap 5, and each of the upper bearing blocks I3a and i3 is provided with a similar horizontal bore 35 adapted for registration with corresponding bore 34; the inserts I0 and II are similarly provided with horizontal bores 36 for registration with the bores 34 and35 in the adjacent bearing blocks I3 and side 2 of the machine frame.

A securing pin 31 of substantial dimensions is provided for each of the sides I and 2 of the machine frame and is, in the case of the side I adapted to be inserted into the bore 34 in such side and to be passed through the bore 35 in the bearing block I3a to secure the latter against movement in the slot I! of the side I of the machine frame whilst, in the case of the side 2, the securing pin 31 is adapted to pass through the coarse through the bores frame to lock the pin 31 against axial movement in the latter. The rollers 8 and 9 are both of similar constructions and are disposed one directly over the other their axes parallel to one another. Each roller comprises a hollow cylindrical core 42 and cylindrical impression cylinder 45, the said core having a peripheral flange 43 at the end thereof adjacent the side I of the machine frame and being mounted and fixed upon an axial shaft 44 which projects beyond both ends of the core 42, the projecting ends of the upper roller shaft forming trunnions which are supported in the upper bearing blocks I3 and Ita whilst the projecting ends of the shaft of the lower roller form trunnions which are journalled in the bearing blocks l4 and Ma.

An impression cylinder 45 is concentrically mounted on each of the roller cores 42, such cylinders being formed of bronze or other suitable metal and each having in its outer surface depressions 46 of any suitable form depending upon the shape of the sweets to be moulded by these impression cylinders. The impression cylinders 45 are identical in form and'are prevented from rotation with respect to their roller cores 42 by the engagement of radial inwardly directed'keys or teeth M on the end flanges 43 of the roller cores and which keys or teeth 41 engage in correspondinglypositioned keyways or notches 48 in the adjacent ends of the impression cylinders.

The impression cylinders are each detachably retained on their roller cores 412 by a retaining plate or disc 49 engaging the adjacent end of the impression cylinder 45 and secured to the corresponding end of the roller core 42 by a quick release fastening comprising socket headed screws 5%) passing through arcuate slots M in the retaining plate and having their heads 52 adapted to engage against inwardly directed keyhole-shaped flanges 53 of-the slots 5i. Thus the impression cylinders may be released from their rollers by slacking off the screws 50 and then giving the retaining plates a slight turn about the roller shafts in order to bring the heads 52 of these screws into alignment with the enlarged portions of the keyhole-shaped slots in the retaining plates to enable the latter to be drawn axially from their roller shafts t4 and so to release the impression cylinders for endwise withdrawal from the roller cores 42 away from the flanged ends of the latter.

To permit of rotational adjustment of at least one of the rollers about the shaft 44 in order to bring the depressions 46 in the two impression cylinders of the two rollers into strict register with one another, one of the rollers is provided with adjusting means, such means being shown in the drawing as applied to the top roller and comprising a collar 54 which is keyed or otherwise fixed upon the shaft 44 and furnished with a pair of diametrically opposite sector-shaped wings 55 each seated in a correspondingly shaped but largerrecess 56 in the adjacent end of the ons ore roller "core 42 substantially tangential i. adjusting grub screwsi'l and 58 being DIOVidGdiIIithGLEIld of 'thBiSflidflOllGF-LCOI'G to enable: theiangulariposition of the core. about the axis Of'lthe shaft 44 .to be adjustedto a'small extent. This arrangement is clearly shown in Figure 5.

,It will-.beunderstood that -.when;the;machine is .in.normal operation the bearing :blocks 13 and 13a: of :theupper roller are fixed Y whilst the. lower ibearing blocks l4 and Ma for the lower rollerare vertically adjustable by appropriate umanipulation of the cams .Zl the upwardiand' downward adjustment-ofthelower blocks l4 and Mabeing limited by the horizontal movement permissible to .the cams 2|. The inward movementof the cams 2| is limited bytstop pins '59 fixed tov their inner ends and the outward movementof the cams is limited by their end portions :32; abutting stop surfaces on the machine frame.

The shafts of the upper and lower rollers are geared together by spur gears 69 fixedion the ends of the shafts outside the side lof themachine frame and the ,necessarydrive is imparted to this gearing by further gearing Bl which may be driven through ashaft 62, pulleys 6.3..and..64 and a belt 85 from an electric motor 65 carried by .thebase 4 of the machine, or by any other suitable driving means.

The machine is furnished. as'is usual with drop roller machines for the manufacture of sweets, with a pair of superposed presizingv rollers .61 arrangedoneabove the other .in front of, the moulding rollers 8 audi These rollers do not normally have to be removed from the machine and therefore may bemounted in the sides I andZ of the machine in the usual manner. A feed trayiifi is provided tolead the plastic sugar to the pro-sizing rollers and a platform or tray 69 serves to leadjthe presized or pre-rolled plastic sugar an inclined discharge chute 10 serves to lead'the moulded sweets from the mouldin rollers to. an endless conveyor or any'other suitable discharge apparatus.

The temperature of the moulding rollers is preferably controlled by circulation of water through the rollers and this may be either cold water or hot water according to-whether it'is desired to cool the rollers or toheat them.

For the purpose of water circulation through the rollers-each of the shafts 44 -is' provided with an axial bore-ll closed at its inner end and open at'its outer end, such bore communicating, by 'two axially spaced series of radial bores'li! and l3,with the opposite ends of 'an internal annular chamber 14 formed between the hollowcore42 and=the:shaft44.

The axial bore ll of eachshaft 44 isformed in two diameters-the outer portion 1j5o'f'the bore being of larger diameter than'the'inner portion ofthebore into which fits'tightly theinner end of .a rigid tube iti arranged-coaxially in theibore H and projectingthrough and outwardly beyond the opencend of the. shaft.

Water is supplied totheouterrends:of the-iupper :and lower tubes 16 by meansof: a-supply pipe 11 :communicating withthe upper tube'ilfi by a rigid T-element 7.8 and :with theilower' tube .16 by a :flexible hose 79 which does not-interfere :with the freerupward and downward -adjustment of the bottom moulding roller"9. The-water is supplied 'tothe pipellfrom a suitable supply-pipe 86 -..whi-ch also-supplieswater to'the pro-sizing rollers -67, :thezflow of waterbeing controlledby appro- :priate walvesv such :as' the valves 8 l and 82.

to the moulding rollers 8 and 9, whilst I being necessary. It will also HIheZ: open endsixof the :bOlES "I I ;;andaShafts 44 andithe pipe Ti and :parts associated therewith are arrangedatsthe gear-provided .ends of .:the SlllaftSJQa,'-i.e. at thesside of the machine opposite to .tl'iat atawhichwthe removable insert sections .ZIU and i i I are :prOVldBd, 8,I1d adjacent the saidlopenings the sha'fts #34 are provided with annual grooves 83 whichwill impede theflow of water axlally along the outsides of the-shafts when water is discharged from' the enlargedportion of the bore la thewaterthatissuppliedthrough the 'tubes'ltpassing-along the shafts 44 through the radial bores l2 into the annular chambers .14 and then out of the latter through the radial bores 13 into the enlarged portions 75 of the axial boresflof the shafts and then being discharged from'theopen ends of the shafts on to inclined deflector plates 84 having cut-away corners -85,see Figure 6, carried 1111a, rectangular housing 86;:de- .tachablyifixeditoithe side I of the machine and having an outlet pipe 8"! .at the bottom thereof.

The gearingv Ethel, etc. and the housingtt of the .water circulating systemcmay all ;be .=.en close.d by a protective guard 88.

The operationof the machine above described in so farras this invention is concerned-isles follows:

I Assuming that the machine has been in operation and thatit is desirable to changethe-impression cylinders 45 because either these cylinders have become clogged with the plastic sugar or it is desired to use alternatively patterned impression cylinders, then in order to effectthis change the machineis stopped and theibottom roller is lowered by first looseningthe adjusting screw 28.soas to free the quick-release block 38, which is swung. aside, and then pushing the cross bar ZTinwardly. Next, the pin 3*! in thesidel of the machine frame is withdrawn so as tofree the removable insertsections iii and H in order that .theymay be slidden upwardly out of the gap 5v in the said frame side 2.

'After the sections Hi and l l have been lifted from the gap"5 and laid aside, the bearings I73 (and [4 are vdrawnfromthe ends of the roller shafts 44 which they have been supporting so thatthe endsof the. rollersiB and9 at the side 2 .of the machine are .wholly exposed. The socket headed screws '50 securing thereta-ining plates 49 :are now released and these retaining-platesare given a-slight angular rotation aboutthe shafts "44 of the rollers so as to bring-the heads'ofthe screws 50 into the enlarged portions of the keyhole slots 5i after which the retaining plates may be withdrawn endwisefrom'the roller shafts 44. The-impression cylinders are now free for endwise withdrawal from their roller cores.

when the impression cylinders have been cleaned and are ready for remounting upon the :roller cores, or alternative impression cylinders 'are ready for mounting on these cores, these Jimpression cylinders are mounted and the vari- 'ous parts of the machine re-assembled in-a man- '-ner the reverse of that above described for the removal of the impressioncylinders from the roller cores.

The operation above described takes only a matter of a few minutes and is easily accomplished without the exertion of any considerable -mechan-ical skill or exceptional physical force be seen that the impression cylinders can'be'changed without in anyway interfering with the water circulating systemor other operative; parts of themachine.

*In addition the speeding up} of the operation"of changing the impression cylinders achieved by this invention avoids the hardening of the plastic sugar batch in the machine which has hitherto been a further disadvantage of the known machines of the type referred to.

I claim:

1. A machine for moulding plastic material, particularly plastic sugar from which confectionery is made, comprising a frame having a pair of spaced upstanding side members, a pair of cooperating moulding rollers mounted between said side frame members, bearings for the trunnions of said moulding rollers mounted in slots in said frame side members, one at least of said frame side members having a gap wider than the exter- L nal diameter of each of said rollers and o posite the adjacent ends of'the latter, and positioning means in said gap for operatively locating in the gap-provided side member of said frame the bearings for the said trunnions of said rollers at the end adjacent this frame side member, such positioning means defining the said slot for the said bearings and being movable transversely of the axes of the said rollers for releasing the said bearings normally positioned thereby and opening the said gap to enable the said rollers to be withdrawn endwise through the said gap.

2. A machine as claimed in claim 1, wherein said bearings comprise a pair of bearing blocks mounted one above the other in each of the slots of said frame side members for receiving the trunnions of the respective adjacent end of a moulding roller, and the positioning means comprise locating sections positioned in the gap of the gapped frame side member in interengagement with, and one on either side of the bearing blocks in this gap, said machine further including means for securing the said insert sections removably in the gapped frame side member.

3. A machine for moulding plastic materials, particularly plastic sugar in the manufacture of confectionery, comprising a frame having a pair of spaced upstanding side members, a pair of co-operating moulding rollers mounted one above the other between said frame side members, bearing means for the trunnions of said rollers mounted in said frame side members, driving means for said moulding rollers, and positioning means mounted in one frame side member at least of the machine for locating said bearing means in position in this side member, said positioning means being movable relatively to the remainder of its frame side member in a direction transverse to the axis of rotation of the rollers to release the bearing means located thereby and to leave a gap in the frame side member large enough to permit the endwise passage of a moulding roller.

4. A machine for moulding plastic material, particularly plastic sugar from which confectionery is made, comprising a frame having a pair of spaced upstanding side members, a pair of co-operating moulding rollers mounted between said side members, an outer coaxial impression cylinder mounted on each of said rollers and rotatable therewith but withdrawable axially therefrom, bearings for the trunnions of said moulding rollers mounted in slots in said side members, one at least of said side members having a gap which is wider than the external diameter of each of said impression cylinders and is located opposite the adjacent ends of the latter, and positioning means for operatively locating in the gap in their frame side member the bearings for said trunnions of said rollers at the end adjacent the gapped side member, said position of the machine frame so as ing means defining the said slot for the said bearings and being movable transversely of the axes of said rollers for releasing the bearings normally positioned thereby and for opening said gap to enable one at least of the impression cylinders to be withdrawn endwise from its roller and through said gap.

5. A machine for moulding plastic material, particularly plastic sugar from which confectionery is made, comprising a frame having a pair of spaced upstanding side members, a pair of co-operating moulding rollers mounted between said side members, an outer coaxial impression cylinder mounted on each of said rollers and rotatable therewith but withdrawable axially therefrom, a pair of superposed bearing blocks, each for supporting the end trunnion of a moulding roller, mounted in a slot in each frame side member, one at least of said side members having a gap which is wider than the external diameter of each of said impression cylinders and is located opposite the adjacent ends of the latter, and positioning means for operatively locating in the gap in their frame side member the bearing blocks for said 'trunnions of said rollers at the end adjacent the gapped side member, said positioning means defining the said slot for the said bearing blocks and being movable transversely of the axes of said rollers for releasing the bearing blocks normally positioned thereby and for opening said gap to enable one at least of impression cylinders to be withdrawn endwise from its roller and through said gap, and cam means operable from the exterior of the machine for adjusting the lower bearing blocks relatively to its frame side member to vary the position of the lower roller with respect to the upper roller.

6. A machine according to claim 5, including an adjusting screw co-operating with said cam means and a spacing block which is pivotally mounted on the machine frame and on which said adjusting screw is adapted to bear, said pivoted block being movable out of alignment with said adiusting screw to provide for more rapid adjustment of the cam means.

'7. A machine according to claim 4, wherein said rollers are provided with detachable retaining plates at one end thereof to secure the said impression cylinders upon the rollers, and the latter are provided with screws co-operatin with keyhole slots in the said retaining plates to serve as quick release fastening means for said retaining plates.

8. A machine according to claim 4, wherein the two moulding rollers are geared together and at least one of them has means for rotationally adjusting its impression cylinder about the axis of the roller.

9. A machine according to claim 4, wherein the said moulding rollers are hollow and means are provided for circulating roller temperature regulating liquid through said rollers, such circulating means being connected to the ends of the roller trunnions remote from the gapped member to be undisturbed by the removal of the said positioning means and bearings of this side member.

10. A machine for moulding plastic materials, particularly plastic sugar in the manufacture of confectionery, comprising a frame having a pair of spaced upstanding side members, a pair of cooperating moulding rollers having trunnions and mounted one above the other between said side members, an impression cylinder forming the periphery of each said moulding roller and rotatableiwith, butaxial lyqwithdrawabl-e from; this roller, one at least ozfesaid sidemembers-being formed with" argap ofsa Width sufiicienttopermit the'vpassage thereth-rough s'of van impress-ion cylin-nder 1 on Withdrawal. of. thexlatten axially from. its roller, bearin means 1 :fOI'T' the trunnions of said rollers mounted in said gap in the one sideim'emaherand in avertical: slot in the other side member the. bearing Ineansv for; reception in' the gapped side memberibei-ngless-in Width than this gap; andat least-one insertsection mountedzin said gapfor guided-movement transversely to the axes ot rotation of the moulding rol-lers,.said insertsection being adaptedetoiposition such bearing-gmean-sin position in saidgap 'but, on removalifrom the gap-to releasesaicl bearing means for removali andopem thegap to permit the passage of antimpressionlcylinder.

IL. A machine-- for moulding plastic materials, particularly plastic sugar in the manufacture of confectionery; comprising a frame having a pair oispaeed upstanding sidemembers, a pair of co-' operatingimouldingv rollers having. trunnions and mounted..one above the other betweenrsaid side members-,animpression vcylinder."forming the periphery of; eachsaid-mou-lding roller and rotatable with-,1 bu-tsaxially withdrawable from, this roiler, oneatileast ofsaidtsides-membersbeing formed withagap-ofawidth suificient to permit the pas- I52 sageptherethrough: of. an impression cylinderon withdrawali of; the latter. axially from its rolier,- a bearing? blochfoneaclr roller trunnion, a .pair of such block-s being; arranged in said gap' and the other pair in a verticakslot in the otherside memher, the bearing blocks for reception in saidgap- ALFRED WALTER BARKER;

CBS 7 CETIFD The-=foll0wingreferences are of record in" the file of this-patent:

UNITED STATES PATENTS Number Name-v Date 36 1,822.. Hohre et a1 Apr. 25 1887 1,791,568 Dean 2 1 93 1 2,308,0i0.v Anderson Jan. 12; 19-43 

